Implication of b→cτν¯τ flavor anomalies on Bs→Ds*τν¯τ decay observables

Abstract

Abstract The experimental predictions of R D , R D * , R J/ψ , P τ D * and F L D * in B decays mediated via b → c l ν ¯ τ quark level transition deviate significantly from the standard model expectations. The current world average of the ratio of branching ratios R D and R D * in B → D ( * ) l ν ¯ l (l ∈ e, τ) show 1.4σ and 2.5σ deviation from the SM expectations. Similarly, the τ polarization fraction P τ D * and the longitudinal polarization fraction of the D* meson F L D * in B → D * τ ν ¯ τ are found to deviate from the standard model expectations at 1.6σ and 1.5σ level, respectively. In addition, the ratio of branching ratio R J/ψ in B c → J / ψ l ν ¯ l deviates from the standard model prediction at 1.7σ level. In this regard, we study the implication of R D , R D * , R J/ψ , P τ D * and F L D * anomalies on B s → D s * τ ν ¯ τ decay observables in a model independent effective field theory formalism. We give predictions of several physical observables in the standard model and in the presence of various 1D and 2D new physics scenarios.